This comprehensive service and repair manual is specifically designed for the Audi A4 (1998), including the S4, A4 RS4 Avant, and Allroad models, covering all variants with chassis codes 8D, 8D2, and 8D5. It provides detailed information on virtually every aspect of your Audi, allowing you to perform repairs and maintenance with confidence.

The manual offers a wealth of information, encompassing:

* **General Information:** Gain an understanding of the car's overall design, specifications, and operation.
* **Accessories & Equipment:** Find detailed information on the installation and operation of various accessories and optional equipment.
* **Audio, Visual & Telematics:** Learn about the car's sound system, navigation, and other multimedia features.
* **Brakes:** Explore everything from brake system fundamentals to troubleshooting and repair procedures.
* **Driveline Axle:** Gain comprehensive knowledge about the drivetrain, including axles, differentials, and related components.
* **Electrical:** Dive into the car's electrical systems, covering wiring diagrams, component identification, and troubleshooting.
* **Lights:** Understand the operation, maintenance, and repair of all lighting systems, including headlights, taillights, and interior lights.
* **Restraints:** Learn about the safety features of your Audi, including airbags, seatbelts, and other restraint systems.
* **Steering:** Explore the steering system, covering its components, alignment, and repair procedures.
* **Suspension:** Gain knowledge about the car's suspension setup, including components, adjustments, and repairs.
* **Body & Frame - Interior & Exterior:** Explore the car's bodywork, interior trim, and exterior features, providing guidance on repairs and maintenance.
* **Mechanical Engine:** Delve into the heart of your Audi, gaining detailed knowledge about the engine, its components, troubleshooting, and repair procedures.
* **Transmission:** Understand the operation, maintenance, and repair of your car's transmission, covering both manual and automatic types.
* **Tire & Wheels:** Explore all aspects of tires and wheels, including selection, mounting, and maintenance.
* **HVAC:** Learn about the air conditioning and heating systems, covering troubleshooting and repair procedures.
* **Wiring Diagrams:** Detailed wiring diagrams provide a visual guide to the vehicle's electrical system, aiding in troubleshooting and repair.

This comprehensive manual will become an indispensable tool for any Audi A4 owner, providing the information you need to maintain, troubleshoot, and repair your vehicle effectively.

The Audi A4 (1998) is a compact executive car produced by German automaker Audi from 1994 to 2001. The "8D" platform, launched in 1994, marked the first generation of the A4 (codenamed 8D). It replaced the Audi 80, and was offered in sedan, Avant (wagon), and Cabriolet body styles. The A4 was highly praised for its sharp handling, refined interior, and available quattro all-wheel drive system. It was offered with a range of gasoline and diesel engines, including the potent 2.8-liter V6 and the 1.8-liter turbocharged four-cylinder engine. The latter, known as the "1.8T," became a popular choice for enthusiasts due to its impressive power and tuning potential, contributing to the A4's lasting popularity.

The 8D platform also spawned several performance variants, including the S4 and RS4. The S4, launched in 1999, boasted a 2.7-liter twin-turbocharged V6 engine producing over 250 horsepower, offering a significant performance boost over the standard A4. The RS4, introduced in 2000, was the pinnacle of performance. It featured an even more potent 2.7-liter twin-turbocharged V6, producing 380 horsepower and propelling the RS4 Avant to impressive speeds. The Allroad quattro, introduced in 2000, emphasized practicality and off-road capability with its raised suspension, all-wheel drive, and rugged styling. These variants broadened the A4's appeal to a wider range of audiences, further solidifying its place as a popular and well-respected model in the premium compact segment.